📊 经济学工具

⏱️ 72 法则计算器Rule of 72 输入年化收益率，按 72 法则估算本金翻倍所需年数（72÷收益率%），用于投资回报的快捷心算与科普。Rule of 72 - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📊 CAGR 计算器Cagr CAGR = (终值 / 初值)^(1/n) − 1Cagr - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔗 交叉价格弹性计算器Cross Elasticity 输入相关商品需求量与价格变动，计算交叉价格弹性，判断商品间替代或互补关系，用于定价与市场竞争分析。Cross Elasticity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💰 复利终值计算器Compound Amount 复利终值计算器，按本金、年利率、每年复利次数与年限求终值，用于投资与理财规划。Compound Amount - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 失业率计算器Unemployment Rate u = 失业人数 / 劳动力 × 100%Unemployment Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📉 奥肯定律计算器Okuns Law Δu ≈ −½(实际增长 − 潜在增长)Okuns Law - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🏦 实际 GDP = 名义 GDP / (1 + 平减指数%)Real Gdp 实际 GDP 计算器，用 GDP 平减指数剔除价格变化得实际产出，用于经济增长真实比较。Real Gdp - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🧾 年金现值计算器Annuity Present Value 输入每期期末收款 PMT、期数 N 与每期利率 i，按折现计算等额年金的当前价值，适用于年金保险与分期收款估值。Annuity Present Value - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📅 年金终值计算器Fv Annuity 输入每期期末存入金额 PMT、期数 N 与每期利率 i，按复利计算等额年金在期末的累积终值，适用于储蓄与教育金规划。Fv Annuity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💼 收入弹性计算器Income Elasticity 收入弹性在线计算器，输入需求量与收入变动率求得需求收入弹性，判断正常品或劣等品，用于微观经济分析，纯前端。Income Elasticity - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔄 政府支出乘数计算器Spending Multiplier 政府支出乘数计算器，按边际消费倾向 MPC 求政府购买乘数，用于财政政策效应分析。Spending Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 💵 现值计算器Present Value 现值（PV）在线计算器，输入未来金额、折现率与期数求得当前价值，用于投资与理财决策，纯前端运行。Present Value - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由两期 GDP 求增长率Gdp Growth Rate 输入本期与基期 GDP，按 g=(GDP_t−GDP_{t−1})/GDP_{t−1} 计算经济增长率，用于宏观经济增速的直观测算。Gdp Growth Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🏭 由产量与劳动增量求边际产量Marginal Product Labor 劳动边际产量计算器，输入产量增量 ΔQ 与劳动增量 ΔL 按 MPL=ΔQ/ΔL 求边际产量，用于生产函数分析。Marginal Product Labor - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚡ 由价格水平、产出与货币量求流通速度Velocity of Money 货币流通速度计算器，输入价格水平 P、实际产出 Y 与货币量 M 按 V=P·Y/M 求流通速度，用于货币数量论。Velocity of Money - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚖️ 由出口与进口求贸易差额Balance of Trade 贸易差额计算器，输入出口 X 与进口 M 按 BoT=X−M 求贸易顺差或逆差，用于国际收支分析。Balance of Trade - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 由劳动力与总人口求劳动参与率Labor Force Participation 劳动参与率计算器，输入劳动力 LF 与适龄人口 POP 按 LFP=LF/POP 求参与率，用于就业市场分析。Labor Force Participation - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. ⚖️ 由名义值与通胀率求实际值Nominal to Real 名义转实际值计算器，输入名义值与通胀率 π 按 Real=Nominal/(1+π) 剔除价格影响，用于实际变量分析。Nominal to Real - convert values online, free and instant. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Econom... 💯 由实际利率与通胀求名义利率Fisher Equation 费雪方程计算器，输入实际利率 r 与通胀率 π 按 i≈r+π 求名义利率，用于利率与通胀分析。Fisher Equation - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 👥 由就业与失业人数求劳动力Labor Force 劳动力规模计算器，输入就业人数 E 与失业人数 U 按 LF=E+U 求劳动力总量，用于宏观经济统计。Labor Force - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由支出乘数反推边际消费倾向Mpc from Multiplier 输入支出乘数 k，按 MPC=1−1/k 反推边际消费倾向，用于宏观经济学中乘数效应与消费行为的教学分析。Mpc from Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📊 由支出分项求 GDPGdp Expenditure 输入消费 C、投资 I、政府支出 G 与净出口 NX，按支出法 Y=C+I+G+(X−M) 计算国内生产总值，用于宏观核算。Gdp Expenditure - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 由消费与收入增量求边际消费倾向Marginal Propensity Consume 边际消费倾向计算器，输入消费增量 ΔC 与收入增量 ΔY 按 MPC=ΔC/ΔY 求边际消费倾向，用于乘数分析。Marginal Propensity Consume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🥧 由消费与收入求平均消费倾向Average Propensity Consume 平均消费倾向计算器，输入消费 C 与收入 Y 按 APC=C/Y 求消费占收入比重，用于消费行为分析。Average Propensity Consume - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔢 由资本、劳动与技术求产出Cobb Douglas 输入全要素生产率 A、资本投入 K、资本弹性 α 与劳动 L，按生产函数 Y=A·K^α·L^(1−α) 计算产出，用于宏观与增长分析。Cobb Douglas - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📉 由边际消费倾向求税收乘数Tax Multiplier 税收乘数计算器，输入 MPC 按 k_t=−MPC/(1−MPC) 求税收乘数，用于减税效应分析。Tax Multiplier - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 📈 通货膨胀率计算器Inflation Rate 输入两期消费者价格指数 CPI，计算时期通货膨胀率，用于物价水平变化与货币购买力的量化评估。Inflation Rate - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools. 🔁 需求价格弹性计算器Elasticity Demand 需求价格弹性计算器，用中点法求需求量对价格的弹性(避免端点依赖)，用于定价与需求分析。Elasticity Demand - free online tool. Free online tool on ToolBox — 100% client-side, no data uploaded, no install. Part of the Economics tools.